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Leonardo Francisco 812b534653 validity: fix verify/identify stuck on non-matching finger 
The VERIFY_WAIT_MATCH_INT state only advanced the SSM on interrupt
types 3 (match) or 5 (no-match), looping back to read_again for any
other type. However, the sensor only sends a single interrupt after
match_finger (cmd 0x5E). If the interrupt type is anything other than
3 or 5, the driver waited forever for another interrupt that never
arrives, causing fprintd-verify to hang.

python-validity's reference implementation treats any interrupt type
!= 3 as 'finger not recognized' and skips cmd 0x60 (get_match_result),
going straight to cleanup (cmd 0x62).

Fix: on interrupt type 3 (match), advance to VERIFY_GET_RESULT as
before. On any other type, clear stale result data and jump directly
to VERIFY_CLEANUP, skipping the unnecessary cmd 0x60.
2026-04-22 03:06:34 +00:00
.ci ci: Add ABI check 2019-08-05 20:05:13 +02:00
.gitlab-ci ci: Add PyGObject symbols 2026-02-10 06:33:00 +01:00
data validity: Add new driver for Validity/Synaptics VCSFW sensors 2026-04-22 03:06:34 +00:00
demo scripts/uncrustify: Use 2-spaces indentation for defines too 2025-02-20 15:50:46 +00:00
doc build: Stop using deprecated dep.get_pkgconfig_variable() method 2024-02-20 01:02:00 +01:00
examples examples/clear-storage: Remove local storage for devices without storage 2025-02-20 16:37:11 +01:00
libfprint validity: fix verify/identify stuck on non-matching finger 2026-04-22 03:06:34 +00:00
scripts scripts/uncrustify: Use 2-spaces indentation for defines too 2025-02-20 15:50:46 +00:00
tests validity: format code for consistency and readability 2026-04-22 03:06:34 +00:00
.git-blame-ignore-revs .git-blame-ignore-revs: Ignore formatting commit and add hint how to use it 2020-12-07 19:01:10 +01:00
.gitignore validity: fix verify/identify stuck on non-matching finger 2026-04-22 03:06:34 +00:00
.gitlab-ci.yml ci: Make jobs interrumpible 2026-02-10 06:35:26 +01:00
AUTHORS AUTHORS: Update 2012-12-14 13:17:24 +01:00
code-of-conduct.md Add code of conduct document 2019-07-25 12:04:39 +02:00
COPYING upekts relicensing 2007-11-15 09:54:35 +00:00
gcovr.cfg gcovr: Add gcovr project configuration 2025-08-01 01:42:01 +02:00
HACKING.md HACKING: Clarify the intent of the license 2019-08-05 13:37:28 +02:00
INSTALL INSTALL: Update for Meson 2018-05-18 01:16:30 +02:00
MAINTAINERS Add MAINTAINERS file 2020-05-22 15:00:11 +02:00
meson.build validity: Add TLS session management (Iteration 2) 2026-04-22 03:06:34 +00:00
meson_options.txt tests: Add support for installed tests 2023-06-28 16:35:16 +02:00
NEWS Release 1.94.10 2026-02-10 03:18:14 +01:00
README.md README: Add contact information 2024-05-03 15:35:11 +02:00
THANKS Thanks to Greg and Martin from AuthenTec 2012-11-29 09:51:55 +01:00

README.md

LibFPrint

LibFPrint is part of the FPrint project.


Button Website Button Documentation

Button Supported Button Unsupported

Button Contribute Button Contributors

History

LibFPrint was originally developed as part of an academic project at the University Of Manchester.

It aimed to hide the differences between consumer fingerprint scanners and provide a single uniform API to application developers.

Goal

The ultimate goal of the FPrint project is to make fingerprint scanners widely and easily usable under common Linux environments.

License

Section 6 of the license states that for compiled works that use this library, such works must include LibFPrint copyright notices alongside the copyright notices for the other parts of the work.

LibFPrint includes code from NIST's NBIS software distribution.

We include Bozorth3 from the US Export Controlled distribution, which we have determined to be fine being shipped in an open source project.

Get in touch

  • IRC - #fprint @ irc.oftc.net
  • Matrix - #fprint:matrix.org bridged to the IRC channel
  • MailingList - low traffic, not much used these days

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